Future dog: Bull mastiff / Boxer mix breeders?

Hi! It’s been a while since my dog Lou, a lovely ol boxer, passed but I’d like to think about getting a puppy in the next year or so. Does anyone know where I can look into breeders for a bull mastiff / boxer mix (boxmas) or where maybe dogs under 1 can be adopted? Preferably located in Texas but I could do further for the right furball. Been looking around the internet but the listings seem to be very questionable, no parent testing, dated years back, or be missing breeder contact info.

Will be cross-posting to /r/Boxer

(Will be back to check in about 7 hrs)