Keith, the standard rocker ratio is 1.75, but I can machine them to 1.85 or 1.95 also. I have not actually done any other than the 1.75s yet; one of the issues is that since I can offer different ratios, when I machine them I would like to mark the ratio on them somehow, and I haven't been able to figure out a good way to do that yet. It will be very difficult to tell them apart just by looking at them.
I will certainly make replacements available in any form, either individual rockers or paired rockers on the shafts. The only real issue is getting the investment castings for the rocker bodies. But hopefully the foundry will have reduced lead times on those soon. I will keep you in mind for an additional half set.
Joe Craine has ported a set of the SE heads and got 440 cfm with the 2.300" valve. Joe thought that a bigger valve might help some, so I ordered a set of 2.35" valves and they are currently with Joe's heads at my local shop, waiting for the valve job on the heads with the new valves. Unfortunately the local shop is buried and hasn't gotten to them yet. Also, the porting guy at the local shop has a set of the RE heads that he will be trying to port, but he hasn't gotten started on them yet.
I will email you the valve specs - Jay