From v3.1.53, this truck is available in “Used truck market”.
If you want to buy in new truck dealer, please let know me.
I made addon mod.

Note:
Most of parts names are changed. So, your choice is in two ways.
1. Use commands “g_remove_missing_accessories 1” and purchase new parts.
2. Sell current truck and buy a new one.

Credits:
Mondo.N, Eugene