Dealer wholesale should be around $125 on the door latch assembly.
I will try to dig up the box/invoice.
You should also purchase the $10 plastic latch support and the pop rivet. VW screwed up on the pop rivet and the head is way too big, you will need to cut it in 2 places with side cutters.
Luckily with the convertible, you do not need to take the window out.
You will need triple square bits for the latch bolts and the key cylinder bolt.
Something like this should work -
Amazon.com: Capri Tools XZN Triple Square Spline Wrench Bit Socket Sets, S2 Bit, 10-Piece: Automotive
One key item is you will need to remove the latch bolts and the latch will come out with the inner door panel and go back in attached to the inner door panel.
The door handle can be tricky, if you screw up you can get the door handle to hit the glass, you just need to be careful.
If I can PDF the handle adjustment procedure, I will attach it here. It is hard to explain, but stupid simple once you figure it out. Kind of a neat added trick VW added to the latch.