Matranet has updated the website and "The Return of Traxtor" is available to order:
MATRANET [dot] NETIt is a cassette edition and it has both the ZX Spectrum and the Amstrad CPC versions, one in each side.
Disclaimer: I waived any royalties on this one, although I was offered a fair deal. Basically I do this for fun and the physical release is just for people wanting to have it in cassette, and because I think new releases are a nice thing to have if we want to keep the system alive.
Why this disclaimer? I don't want you to buy this to support my work (although I appreciate it!), but because you love the game and want a nice cassette edition that reminds of ERBE's releases back in the 80s.