It’s a 2218 1180KV motor, so you can go 2220 1100kv or 1000kv or 2218 1100Kv. It’s a bigger motor, so isn’t going to be super cheap. Which country are you in and do you mind ordering from China ? If you do that it won’t be quick.
1500 KV is a bit hot for a larger prop, you might be able to do that with a 9x4 or similar prop. You would have to look at the motor chart, see how much thrust it makes with recommended props.
The bushwhacker uses power pack C so the same motor as the other one, 2218 1100kv.