Took some looking at
ComNet, but it looks like your motor is a Wexco D103. I found it by clicking down thru
Top Level > CATALOG - MODEL YEAR > 2007 > 2007 Bay Star Class A Parts Catalog > EXTERIOR > 2007 BSCA - Exterior Shell, on about the third page (scroll to the bottom and click the tiny
arrow to get to the next page) the motor is in the parts list for WIPER KIT 07 BSCA, the link goes to
this pdf file.
According to the parts list, the 2007 had the split windshield, is that correct? I was finding prices in the $150 to $250 range for this motor, you may want to call Newmar directly and price it, they are nowadays very willing to sell you parts directly, they may surprise you and give you a reasonable price and you'd be sure to get the right motor.