#1
My bigsby broke on my epiphone riviera and i never use the bigsby so would like to replace it with a stop tail. However i dont know if standard ones would fit.

I would like to know if a regular stop tail would fit and if not there is there a alternative
#2
take a photo and some of us can help you out.

thankfully even the lowest end stoptails on ebay will fit/work with all the way from low end no name chinese guitars to high end usa production model guitars. The material of the cheapest ones are zinc if it helps.
#4
I'm yet to see a stoptail you wouldn't have to is the bad news. My best advice even though you're not big on the bigsby is find some replacement parts on ebay.
#5
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate