Kind of seems like anything that goes bang or makes our powder go bang (except for flints) are in short supply.
I've used RWS caps for the last 10 years or so, the Green Lable No. 1075 Plus, and I like these very well. However, I would suggest the use of a nipple guard as I have had some splatter at times. I've never had one fail to go off or set off a charge.