Ebayed some brake pads, front and rear set was $23 plus shipping. They are perfect. Taiwan. item 310210873088. seller Benjamin-shop
Putting on was fun, I cant believe how much I like the way Suzuki put together the GS. Sliding pads out the rear without removing caliper. Priceless. Lets not talk about petcocks.
Oddly my rears were more worn than front. Ragged trailing edge to the pads out back.
.....while changing fork springs and oil I got oil on front and the feel went away. Spend the $30 instead of disassemble and clean and replace used pads.