There were many different versions used across Sierras, Granadas etc, so it can be hard to find specific ones.

Although I'd say no chance of getting a brand new one, even finding a second hand one will be lucky. But usual places like ebay etc always handy to try.

This one looks close, it's in rough shape though. Repair kits are available for the rubbers etc.

https://www.ebay.co.uk/itm/Sierra-Co...temCondition=4