There won't be much available in the way of new parts, except for sprockets [from GB Forestry; see thread linked below] and carby kits [from Tillotson]. The thread also contains a link to the Illustrated Parts List for that saw.
Hi Cookimonsta 1990 , I have seen on Ebay a new set of piston and rings for a Canadian chain saw , https://www.ebay.com.au/itm/292809655897 Worth checking it out ,
The doctor tells me I'm crazy, but the voices tell me I'm not. and i just don't know which one to believe!"