you'll probably want to go down to about 115 or 120 in the main jet,& about a 135 to 140 secondary.the easiest way to get jets is to buy them new.i've bought them from carburettor
services at burwood in sydney,hardimans in milperra,& i've also bought weber jets from a place in hornsby,but i can remember the name.
try a search on the dgv weber in this forum,as a couple of months ago someone put his jetting setup for everyone to use.this should be a good starting point.also,the guys at unigroup engineering know a lot about webers,
both dcoe's & dgv's,so you might like to call them for advice.