Hi I have a used trail-lite 8280 TT that was partially renovated when I bought it. The sink seems to be missing the hardware to attach it to the counter top. Here is a pic of the molded sink anchor ...
I would go to LOWES for anything plumbing hardware... Take pieces with you or even photos and they have always had what I needed...
We use LOWES here for anything and seem to always always order things from AMAZON. Once you find the part number just log into AMAZON and most of the the time they have. Things can arrive as fast as you wabt them too. We use two day service here all the time... I call them my old Sears and Roebuck catalog haha...