Suggestions on how to make seats brackets work

[Wander]

I bought the seat trays that I just found out are for the adjustable seats. I cleaned up the trays, painted them and was going to install them today. I quickly realized they do not match up to the mounting points and after some searching I find these trays need the sliders to work. So....anyone have any sliders they are looking to sell...or...is there a way to make this work? I'd like to not re-drill the seat box tops if I can.

The tank install, plumbing, new fuel pump and filter all went great, I should have known....