Why not build one youself?
Disclaimer: This is not an instruction. Use at your own risk. No responsibility taken for whatever you do. Safety first. Kids, dont try this at home.
You need some proper tools, and should have some good soldering experience - SMD parts are really small... And you need some patience and knowledge to find the components.
For starters, check the video below, where Stephen shows the first steps in building it "from scratch".
"TFV#45 - Building Your Own 68030 Amiga 500 Accelerator - SMD Components"
Find basic information, PCB layout, bill-of-material and software on Stephen's github account:
(Note: Stephen is still working the board, releasing updated revisions. Make sure you check board revisions, bill-of-material, and information accordingly.)
Also keep an eye on his YouTube channel, he releases new videos quite often, giving updates on his developments, explaining details of his boards, or even reviewing user boards:
If you need more information, you should watch Stephen's videos, and get in contact with other users via the "Terrible Fire Accelerators" thread on EAB / "English Amiga Board":
Now let's see if we can build the TF530 - watch out for part 2 of our series "Building the TerribleFire TF530 accelerator board"!