There was a photo on the site showing a right angle fitting from a Toyota that Dellow supplied to get around the problem. So maybe a call to Dellow about this part. With the 120Y you could use the speedo cable from something like a 200B for the extra length. I just had a 120Y speedo rebuilt by Advanced Automotive Instruments at Revesby, maybe they could adjust the speedo for you. The only problem with them is they're not open on weekends, weekdays only, & they close at 4 pm. I can also get a 24 volt CD player for the truck & a 100 mm tacho for the racecar through them. Plus he seems like a grouchy old bugger & they're always good value, as they've seen it all & know how to fix it. Just wish he was open Saturdays.
The address for them is Unit B1 77 Carrington St Revesby. Their phone no is 02-9792-7399, the email is advancedinstruments@bigpond.com.au.