Sanborn's Motor Express Inc
Portland, ME
MC-002770 DoT 26772
Acquired by APA Transport 1986
Profiled in Mike Terebecki's The Trucking Pioneers Book II (click image to see Book index)
Acquisitions
Patches of it that are in my project - Facebook Trucking Industry Insignia Patches
Other known patches
If you want your own memoribilia:
Items available on eBay
Note that patches sold by "freedomfifty2k" and "bob82ndabn325inf"are likely promo/replica patches, not patches actually used by the company represented.