Replacing valve seals

Ok finally got back to the project: my 88 trx 300a. I removed the rocker cover, and used an adjustable spring compressor to get the keepers out. Removed the valve seals. Now I need to get some new ones. The guides feel good and tight. I stopped by the local mega dealership. There is no gasket for the rocker cover. What do you all use? Honda bond? Whats an equivalent? Also the adjusting covers had to come off to get the bolts unscrewed from the cover. Those gaskets are listed at $31.00 each !!
Guess I’ll be surfing for better prices today!