Transistor substitute required

[Antony Balcerzak]

Can anyone give me an available substitute for a Power Physics PP3435 in 
a TO3 package? Please & Thankyou.

********************    _/\_   "We have sought for firm ground and found none.
* Antony Balcerzak *   _\  /_   The deeper we penetrate, the more restless
* tekpagan at io.org  *   \_  _/   becomes the universe; all is rushing about
********************     ||     and vibrating in a wild dance."       MAX BORN