I just ordered a Weston 8,000rpm w/ dust collector last Thursday and was delivered today from meatprocessingproducts.com. $130.
The 5,000rpm s about $110.
https://www.meatprocessingproducts.com/52-0601-w.html Features:
Fits most commercial and home vacuums
Precision ball bearing spin testers included
Stable anti-slip rubber feet
Quick and easy blade changing
Specifications:
8,000 RPM continuous blade speed and heavy-duty 110-volt motor
Two dust collector adapters: 11/4” (3.2 cm) and 21/4” (5.7 cm)