HK91 original trigger housing
So I bought an HK91 with a registered DLO pack and it's working through the process. In the mean time I'm looking into buying some spare parts. This will be an INFORMATIONAL thread for myself, NOT A WTB. I don't plan on buying any of the parts until later this year when I get the gun in my possession. Now that the disclaimer is out of the way, my intent it to build a collection of imported HKs (91,93,94) that I can move my DLO pack between at the range. Obviously I'll need the appropriate FA bolts for each and ejectors, but the point of this thread is to discuss specifically the trigger housing. My DLO is coming in a plastic SEF housing. Ideally I want to store all the guns in semi-auto configuration with the DLO locked in a separate case. So right now I'm looking for information on an HK91 trigger housing (and the semi-auto trigger pack eventually).
My question for this thread is: what trigger housing most closely matches the original import configurations of the HK91? Were they 2-position SE or 2 position but marked SEF? Were they plastic or steel? Any additional info or pictures would be great. If you know of any company that has them available, or alternate terms that I can search for that meet my intent, post those as well please?