Woot offers Bora Portamate PM-1100 Universal Mobile Base Kit for $49.99 (orig. $59.99). Free shipping for Prime Members.

Product Description:
Easily move almost any size machine!  The PM-1100 Customizable Mobile Base is the easiest way to make your machines mobile, even if their dimensions are non-traditional or not square.

• Customizable mobile base kit for machines and equipment
• Very low profile - increases machine height by less than 1 inch
• Locking foot levers make it possible to instantly go from stationary to mobile
• 3” hard plastic wheels for easy gliding
• Perfect for garages, woodshops, workshops, or anywhere mobile machines are needed
• Can accommodate 1/2" Or 3/4" thick plywood
• 400 lb. weight capacity

Thanks Maggie