TO35 valve spring retainers?

Hi there. I'm rebuilding an early to35 with the z134 gasser, and i've run into a snag. The retainers on the valves, both pin style and clip style are of a kind I've never seen before. They appear to bea two-component part with ball bearings. The lower component that makes contact with the valve spring appears to be a flimsy pressed 18ga metal bit. Most of them are broken and littering their jetsam all over the valve train. I've searched high and low for replacements, but can't find any. Is there a universal part I can substitute, possibly a single component piece like I've seen on every other valve stem?

Also, for some reason the last person to work on the valve train installed two copper washers under the springs instead of one. Is this standard, or should there only be one per valve? I suspect the person was trying to reduce valve float, but I can't see that valve float would be much of an issue with a low rpm application like the z134. The cylinder head appears to have been cut and fitted with hardened valve seats, which are all shiny and new looking, so I don't think the valve heads are recesssed under factory spec. The valves themselves appear to be new as well. I was told this engine had about a hundred hours of service when i bought it a few months ago, having recently been rebuilt.

I think the extra washer created too much pressure on the retainers and broke them. I've found every other part I need for this tractor so far. I sure would like to finish it off and get back to my yard work.

The ball bearings are used on exhaust valves only, called rotocaps. They were not used on intake valves. Montes Equipment, a NOS Continental dealer may have what you
need.

I may be able to get the retainers. E-mail is open bottom right CLASSIC view.
Wayne

(quoted from post at 12:54:21 08/08/20) The ball bearings are used on exhaust valves only, called rotocaps. They were not used on intake valves. Montes Equipment, a NOS Continental dealer may have what you
need.

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Ah. Terminology is everything. I found Montes Equipment, but they don't have an online store so I'll have to give them a call this week.
Also searched for the part with the right words this time. Found a product on Jensales web site (the forum won't let me post the link) that I'm not sure will fit. Searched for 'continental rotocap', and it was the first link.

Is that the correct part as well? I notice they don't list the z135 or to35 as a model specifically, and no picture or spec on the actual product.

Any clue about the use of the second copper washer, reasons and effectiveness?

(quoted from post at 14:26:12 08/08/20) I may be able to get the retainers. E-mail is open bottom right CLASSIC view.
Wayne

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I tried classic view, but an it says an email is not provided. No PM available either. I'm probably just not doing it right. I think I left PM open on my end, so please message me.