906 Paso Digiplex box

I am having to replace the Marelli DigiPlex box on a 906 Paso.
I can get “recon” ones from Carmo, in Holland, but at about £300 upwards.
Alternatively, IgniTech in Czecho do a complete “plugnplay” unit for about £130.
Has anyone used either of these for a Paso (or anything else for that matter) and give any indication of the effectiveness, or problems encountered?