Uberti Nipples for #10 Rem caps

[JCT]

The nipples on my new Walker don't hold #10 caps tightly at all. The ones on my Dragoon do. According to VTI, they are the same part, but it's obvious that the Dragoon nipples are wider and the will fit the Walker.
Does anyone know where I can buy replacements to fir the Walker that will work with #10 Remington caps? I'd rater not have to buy 3 different cap brands, cappers and pinch them all to fit. #10's work on my other guns, so I'd like new nipples on the Walker. Thanks!

 

[JCT]

All set with help from Phantom Captain and Mykeal: For future reference here at THR,
Treso AMPCO nipples: Part number 11-50-136 are 1/4x28 and fit all Uberti Walkers and Dragoons. They're for #11 caps and Remington #10's and 11's fit well.

 

[mykeal]

Just FYI - Treso's part number system adds a 6 for sets of 6 nipples; the nipple part number is 11-50-13; the part number for a set of 6 nipples is 11-50-136.