3 Pt. parts price?

You should.

The last time I priced those lift arms from a dealer several years ago they were somewhere in the 1 grand vicinity EACH. Mind you these were the heavy duty arms with the extendable link ends and interchangeable balls. I'd suspect that each lift rod is going to run 1-150 each and you can only get them in the aftermarket that I'm aware of. A top link is probably about a hundred bucks for a good one. Keep in mind that this is all Category II stuff I'm talking about...
I would go that route and then install the square telescopic stabilizers from the lift arm to the rear axle rather than the old style stabilizers. That part will probably cost you about the same money and you'll actually have a useable stabilizer... I'm not sure if those were originally used on the 3 cylinder 10 series or if they were introduced on the 30 series but they will fit all the same.
The Cat I arms are light for those tractors relative to what they will lift. The light arms were generally fitted to the 2WD models while the 4WD models had the heavy arms. I'd put the heavy ones on regardless if it was mine.

You can probably look to Sparex or some other such aftermarket supplier for a better price on those parts too. Should be decent enough quality.

Rod