Llama never made a stainless gun. The Max series was either Parkerized or a chrome process called satin chrome. They also had polished chrome. Here's a link to a discussion about this process.
I have several of the satin chrome and it wears very well. Very strong finish. Without seeing pictures it's hard to tell what you have/had.
Llama grips are pretty common but are hard to find for the Minimax series. Here's a link for factory repros if you just need new grips.
Hopefully you get your Llama to where you are happy. These are nice little guns for the money.