Ok,
So I looked into it and you're right. If I want all the electronics to be modern I'd have a lot of work cut out.
On the other hand, I looked up more info on M-TDI injector pumps (hybrid pumps). They can be purchased here for a little over $530 (less if you have a core), or for the DIY folk there is a walk-through here.
I'm going to stick with the mTDI pump because I'm lazy. I'm also going to purchase it because I have a budget that will allow me to do that.
My cost estimates are as follows (various sources, not linked)
AHU/1Z 1.9 TDI engine - 1500-2000
mTDI pump - 530
trans adapter - 600
misc parts - 500
My budget is $4,000
I believe I can recover about $1,500 or more from parts currently in the Z
lates