Scale: 1/48 (ish)
Source: STAR WARS: The Essential Guide to Vehicles and Vessels, Bill Smith (et. al)

The T.I.E. Crawler uses the command module of the T.I.E. Interceptor, which is added to scratchbuilt track modules. The modules are built from plastic card with a little bit of STAR WARS mechandise in that the Drive housing and mounts come from the Darth Maul Double lightsabre Candy container. Further use of kit parts is made in that the Interceptor landing gear is used to create the track supports from the rear of the Cockpit module with a few 1/35 AFV parts for fleshing out the detail.

Image: Side view

Image: Rear view

Image: Details