Some, maybe a lot, of the Ace stores carry a hospital grade unit, last time I checked. Each stores is individually pwned, so none of them are obligated to carry it if demand isn't there fo them. But, it's available in their warehouses ( or was).
I think the vendor them was Leviton (sp?)
The Cooper/Eagle at Lowe's ain't shabby...it handily bettered to stock cheapie that came with the house here. I didn't notice, nor did I take time to really listen for any, differences in the Eagle and the (eventually) PS Audio outlet bought for $50.00.