Looking for crts - Tek 6xx XYs


Hi all

I noticed that my 606 crt has a little phosphor damage, still quite
usable. I guess there is a loose speck of something inside.

However, I thought it might be prudent to see if the list is hoarding
any compatible crts for sale since it might be a worthwhile replacement
one day. Sphere doesn't list them.

Part #'s:
154-0760-** (606)
154-0768-** (606)

Also usually seeking spares for my other units:
154-0562-01 (602)
154-0573-00/01 (602)
154-0727-00 (602)
154-0634-01 (603)