You have a small chance of finding a matching number holdopen. Contact forum member Luger Doc. Chances are he will have the part you need along with the small spring.
Connollys Hide Care will have preserve the holster. I store mine in a large Ziploc. Just oil your pistol and store it in a dry place, perhaps wrapped in waxed paper and placed in a box.
Welcome to the forum!
Charlie
Gun Parts Sales & Repairs
Tom Heller (Luger Doc)
P O Box 398
St Charles MO 63302
Tel 636-447-3006
Email-
hellerarms@webtv.net