I think the green ones are very rare here in Australia.
P.fairrieanum fma Bolmannianum is not really rare its just that it seems growers to kill it regularly. I think 'Bolero' & I bought seedlings of it from the same source recently. I know Bolero is questioning the potting of them, mine were the same, I'll answer that question in his post. My plants seem to be growing very well & hopefully continue to do so. There are a number of hybridist selfing and outcrossing this plant but seedlings produced seem to be low and you need to be very quick in line to buy them.