Yeah, don't look for those NL $5s. Not a good idea.
I'd recommend picking up a few Fitz $25s. At only $4/chip, it would be pretty cheap to get a few shufflers. They're mint, available, and pretty nice! I don't have "extras", but am ordering from Spinetti soon, and could put a handful in my shopping cart as replacements, if you wanted some of those out of my Fitz stash.
I actually have 6-8 spares of the Pick Hobson $5s, if you like electric pink.
There are lots of others that you could try out, but those are the two that come to mind for me, if you want minty chips.
The rack of red Money Tree $5s in the classifieds is pretty tasty looking too. Not mint, so maybe even better for shuffling -- but a lot more chips than you're looking for.
That said...you're only renting them
