Ouch, I was wrong, but 40 bucks still isn't bad for the complete lower with suspension and roadwheels.

https://www.aliexpress.com/store/pro...28e678c2MyFKqd

I don't know how much shipping will be, and it will most likely take two or three weeks to arrive, but this site has 3 pages just for the bulldog parts, and they have pretty much every Heng Long part that's available.