Is G the original one with the rubber bung?
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Think the original was a 'B' (Green) but same sort of thing as the 'G' (Orange), with rubber diaphragm.
You can grab the G's online for about £30.
If I was running a relocation kit on the K03 or K04 I'd use Rev.G's but having fooked the original B and two G's - I think the location of the Turbo to DV is damaging the diaphragm, so the DV+ would make sense for K03 (My D version leaked boost out of the box).
The price of the DV+ is probably a good £50 too much though.