Yes, the link you posted was the first Tourvision adapter built, I have it in my collection upstairs!
I had planned to make something sooner though, ever since I saw the V1 cart riser boards for use in V4 systems (the carts you see with an extra PCB on the back).
Unfortunately while it was a clever idea I kept getting connection problems and eventually it stopped working at all - a side effect of the necessary construction, and the 6 way dip switch wasn't enough to get all game IDs correctly working. That was understandable, those extra cart pins weren't as well documented at the time - I did a lot of work pulling apart how the system works (you probably saw the blog posts already), and spent a LOT of money collecting carts to read the game IDs. Out of respect for cool hacks, I have repaired your one too so don't worry, it still lives!
This is not commercial, I have made 12 in total now and that's all I'm making. I'm keeping 4 myself and selling the other 8 to cover the cost of parts/design/assembly. Luckily the import tax people didn't charge me on the HUcard connectors and the price came down to £51.25 each (just under $65). There is also a modified ROM which adds support for Bloody Wolf and adds a special game ID 255 which turns off the system automation (but not the timer), so any game can be played without guessing compatible IDs.
The CAD file will be posted on my blog soon same as with my Amiga opensource projects. For the person who asked, tototek.com sell the card slot part but they can't be used in a real PC Engine apparently and I don't know if they are still manufactured, 5 left in stock since I bought these. Apologies that all this is in English - I would try to respond in French if it was just short answers, but this is beyond my ability
I'm contacting people in a couple of places in order of interest - please send me a PM if you are interested!
: 
mais l'idée n'est pas la sienne ! 
