I picked this old brush (Fuller set in rubber) off ebay for $9 including shipping. Paid $20 for a 24mm silvertip knot off thegoldennib.com for a total of $29+$5 for epoxy. Took a little effort to remove the old knot but not much. I love it. I didn't have the cash for a nice silvertip so I went this route. I'm glad I did!
Thanks SRP!!!