EF86 tube recomendations

I just got a very cool mid 60s Multivox bass combo. Amp has tons of promise, but has a new EF86 in it that is buzzy. I know the old ones are spendy, but it is worth it to find one. I really like a lot of what that tube does. Any recomendations? Or better yet, anyone have an extra they might sell?

I have an amprex in my route 66 and it works great. I haven't tried any other NOS ef86's but i also hear nice things about phillips

i hear you can get some new ones but they aren't always reliable