Pewter for cantle?

[MacMillan of Rathdown]

Absolutely no reason why you couldn't have a pewter cantle on a dress sporran. If it was me though, I'd have it silver-plated as that would, ultimately, give it a slightly better "look".

[Downunder Kilt]

If you want to see some really nice pewter cantles, I would suggest you try Skye Highland outfitters, one of the sponsers. I know for a fact that Josh has just received a load in for attachment to his horse and goat hair sporrans. I believe he posted a short time ago that he was looking at selling the cantles as stand alones, subject to availability.