The Traction Hobby trucks (From Asiatees) are the only relatively 1/8 trucks out there I'd consider. Pricey, but well spec'd imo. Won't need much else.

Axial Wraith, Bomber and Yeti I'd put out there too - they are larger than their 1/10 cousins and I guess could be considered 1/8 though Axial considers them 1/10. The Wraith especially crawls very well with a few select changes - gearing change and moving the battery up front being the two biggest changes.

Sooner or later one of the manufacturers is going to catch on that a 1/8 or larger crawler is a pretty good idea, I'm sure we'll see one eventually.