Try an automotive & diesel
guy/shop. Odds are they'll be cheaper, & more importantly, not too busy to help you. And a good mechanic
or fabricator can also make a few engineering/drafting drawings of the bracket for you as well. As I could do that kind of thing when I was 15. Both the drawings/design, & the fabrication/welding, so it's not real complex.
Also, it's likely that another cruiser, or sailor in your marina/yard could do one or both jobs, too. If you ask around.