Snell Type E IV Restoration

I Received some Snell Type E IV speakers from my neighbor for helping them with some yard work. They were in the basement and pretty rough. Scratches and chips on the veneer, grills completely destroyed, surrounds dry rotted, etc. I got the cabinets sanded and refinished, veneer chips filled with Quick Wood, working on the surrounds and grills next. At any rate, my question is, I just noticed one of the speakers is missing the felt around the tweeter. I've looked online and cannot find this part. The thought of using felt weather stripping came to mind but the 90-bend radius is pretty tight, it almost needs to be cut from a sheet. Any ideas?

Also, the super tweeters on the back were pushed in. I sucked them out gently with a vacuum but there are still multiple dimples, any concern there?

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There must be somewhere that sells felt strip locally or from a craft/fabric shop.

Falcon Acoustics audio sell felt for their LS3/5a designs, so if absolutely need it you can order from UK, but surely you must have a supplier somewhere nearer.

The tweeter looks like its been through hell, but as a rear facing unit it may not be the end of the world and people have been known to disconnect them anyway, but that is due to positioning within the room possibly stuck in a corner which would cause a lot of reflections of the treble freqs.
 
Hey, those are nice speakers!

Since you're in the US, Grainger sells all sorts of wool felt strips, in multiple widths, etc. Often the felt strips come with adhesive backing.
IMO, you don't have to get that bend 100% correct. I think it can be a right angle made of three straight strips arranged around the tweeter, and it will probably be OK. Unless you're very concerned that the two speakers should match each other 100%, in which case you may have some work to do matching the exact thickness, composition and density of felt, and cutting a large sheet to get that U-bend (expensive).

I don't think you need to be overly worried about the little dimples in the rear tweeters' domes. If they sound OK they probably are OK. Besides, you won't have to look at them all the time, since they're rear-firing.

Good luck with the project.