Recommendation For Small Block Re-usable Valve Cover Gaskets?

Back in the 1970's with a solid lifter camshaft I checked/adjusted valve clearance on the .580 lift/312 duration Isky camshaft I had installed in my 273 bracket racer. I would like to find a similar valve cover gasket that I used back then that I glued to the valve cover and used over and over again (and hopefully not those that cost upwards of fifty dollars). Thank you for your suggestions.