PRS Bernie Mardsden Bridge Insert upgrade?

[djd35de]

Hello 1st post here.

I have a Bernie Mardsden SE.

I upgrade to tonepro locking studs but the brass inserts that comes with kit are way too small in diameter.

I've emailed tonepros and their customer service reallly sucks as I've never received a reply!!!

I want to replace the cheap zinc inserts with either high carbon steel or brass.

Any suggestions?

Thanks in advance.

David