I'm sure Bobbly Longfield has looked into it but the newest Longfields are no longer the weakest link in the axle. Your R&P will go before the Inner or Birf's now so Titanium probably wouldn't do any good. Just cost more....
Although it would be interesting to see someone do it.
If you've got the cash, just go D60. After 5-6 years of breaking Toyota running gear left and right i've finally stepped up to a D60 and i'm really anxious to see how it holds up to the abuse.
You'll save yourself money in the long run.
