Need new felts/rubber for valves

[Bandmaster]

It has been a while since I have logged on to TubeNet, shame on me... I need to find replacement felts for the valves on my BBb Holton 345. When Dan Oberloh restored it back in 2010 he used factory style felts, but they didn't last very long and collapsed into mush. So I got a set of rubber/neoprene felts from Bloke that have lasted for more than 10 years. But when I asked Bloke a while back about getting another set he said he doesn't supply those anymore and didn't even have the specs for what thicknesses to use for under the valve cap and the finger button for a Holton 345. So... I am asking for advice on what is the latest, greatest solution that players are using when upgrading their valve felts? And where should I go to get them! Thank you for any assistance you can give me.

[Bandmaster]

So, it’s been more than three weeks and over 270 views of this thread and nobody has any suggestions? I guess I need to look elsewhere for information, no help here.