Since most boats have the dodger added after they are sold, it is unlikely that any online company can do one for you just using the boat model.
There is absolutely nothing worse than a poor dodger (except possibly not having one at all). If the cloth sags, water will pool and come off at the most inconvenient times. If you can't see through the windows, or your view is obstructed by wrinkles and it can be really dangerous. A poorly built dodger can really make the whole boat look shoddy, IMO.
I think the reason most folks have one made by a local canvas guy/gal is so it is custom fit to the boat and you can get it reworked if you are not happy with it.
When I bought this boat I hardly gave the dodger and bimini a thought. I have since been aboard several other 530s and their dodger/biminis were terrible compared to ours. First, none of the other biminis were high enough to actually stand upright under (I'm only 5'10") even at the helm. Who wants to be crouched over for hours at a time if one must steer and keep a sharp lookout? Those with the dodger unconnected to the bimini (leaving a space through which water would enter in a squall or from spray) were usually too low to see out of when docking, so you would have to peer through that space between the two. Lastly, and really a lot more important than it might seem, none of the others had clear side panels. That obstructed visibility to the side if one was standing in the companionway, obviously, but even more interesting to me was that it turned the dodger into a sort of cave. I didn't like that at all.
My advice is to have yours professionally made and thereafter, if you choose to, you can use the old one as a pattern for your next.