Might try BAR (Blackpool Air Rifles) across the pond.
For example;
Airgunwerks lists gas ram replacements for the Kodiak/Patriot, yet their response to inquiries is that it is discontinued. Emailed BAR and had two freshly manufactured units shipped the same day, along with two new Rekord triggers for much less $$ than used ones locally.
I say all this in an effort to compel you to search FURTHER before giving up. Europe is often the best if not only source for many obscure items, and on occasion a good source for parts not available stateside from domestic (U.S.) airgun manufacturers, even though they DO ship those same parts overseas for retail sales.