Here's a link to the parts drawing for the fenders and foot rests for the 2000 & 3000 series:
[u:0645180db8]
Ford 2000 & 3000 Fenders and Foot Rests parts drawing[/u:0645180db8]
It doesn't list as many different foot rests as my old parts book does. Here's the left side ones from my parts book:
10 C5NN16450H 1 Platform, RH, Except 10 Speed, U.K.-Antwerp, No Longer Serviced, Start Year: 01/01/1965
10 C5NN16450N 1 Platform Assy., RH, U.S., No Longer Serviced (NH-E), Start Year: 01/01/1965
10 C5NN16450N 1 Platform Assy., RH, Basildon-Antwerp, 3400-3500, No Longer Serviced (NH-E), Start Year: 01/01/1965
10 D8NN16450CA 1 Plaform, RH, L/10 Speed, U.S., 3310, Start Year: 01/01/1965
10 D8NN16450CA 1 Platform, RH, 2310-3310, Start Year: 01/01/1965
And here are the right side ones:
14 C5NN16451BV 1 Platform, LH, W/O Handbrake, Start Year: 01/01/1965
14 C5NN16451BY 1 Platform Assy., LH, W/Handbrake, U.S., 2000-3000-4110, Start Year: 01/01/1965
14 C5NN16451BY 1 Platform Assy., W/or L/Handbrake, 3400-3500, Start Year: 01/01/1965
14 C5NN16451AJ 1 Platform, LH, L/Handbrake & Raised Fenders, W/10 Speed,, 2300-3300, No Longer Serviced, Start Year:
01/01/1965
14 C5NN16451AS 1 Platform, LH, W/Handbrake & Raised Fenders, L/10 Speed, 2300-3300, No Longer Serviced, Start Year:
01/01/1965
14 C5NN16451AZ 1 Platform, LH, L/Handbrake, W/Raised Fenders, W/10 Speed, 2300-3300, No Longer Serviced, Start Year:
01/01/1965
14 C5NN16451AY 1 Platform, LH, W/Handbrake & Raised Fenders, L/10 Speed, 2300-3300, No Longer Serviced, Start Year:
01/01/1965
14 C5NN16451AL 1 Platform, LH, L/10 Speed, 2310-3310, No Longer Serviced, Start Year: 01/01/1965
14 D2NN16451B 1 Platform, LH, W/10 Speed, 2310-3310, NH-E Only, No Longer Serviced, Start Year: 01/01/1965
So it looks like you need to know whether your 3000 is a US or a European tractor and whether it has the 10 speed (Select-O-Speed) transmission or not, and whether you have the regular ag chassis, vineyard chassis (3300) or narrow chassis (3310) model.