Looks some what like our Ryan Tracaires, might be a Renovaire. Parts are available from R&R Products 1-800-528-3446
www.rrproducts.com.
Spoons 1/2 closed part # R201310 $3.65 each
Spoons 3/4 closed part # R201311 $3.65 each
Clamps R515198 $1.95
Other items available for this unit also, but that should give you a general idea of what you can expect in costs.
Shipping is free with orders of $400 or more. And definately ask for a catalog.