How about converting your X1 to a X2 (maybe only partially)? Not sure about the conversion cost, but my bet is you can do it for less than the cost of a new kit.
SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz