NOTE: I'm willing to trade in whole or in part for a GS-1 split-image focusing screen or extension tubes.
I have a bunch of miscellaneous Bronica GS-1 accessories. Since these are all small and light, postage will be $5 anywhere in the US via postal service. Contact me if you're outside the US or want to use a different carrier, and I'll get you a quote.
1) Bronica Close-Up lens set (CUL-1 and CUL-2) 72mm thread. With cases, clean and in good condition, though the cases tend to leave lint on the filters. $30
2) Bronica standard microprism focusing screen. Good condition, in box. This is the one on the left in the photos. $25
3) Bronica standard microprism focusing screen. This one has a significant scuff mark (not a scratch) on it. $15
4) Bronica waist-level finder. Very good condition. $60
More pics on request.