Bushings

Sucks breath in through teeth

Tricky finding them*

As to the seals. To get at the bushings youre going to have to remove both oil(internal) and dust(external) and usually its going to destroy them getting them out. You might if youre careful be able to remove the external dust seals carefully enough not to damage them but the oil will not survive the encounter so best get looking now. Although im one for sticking to the original parts the seals on early bombers are harder to find and tbh were never that good if you jumped anything, blown seals arent unusual for this fork. General use theyre great but big hits take their toll quite quickly
For that reason i'd recommend
http://www.enduroforkseals.com/To remove the old seals, i use a XL long flat bladed screwdriver with multiple layers of gaffa round the shaft to protect the leading edge of the fork as you have the rest it on the edge to apply enough pressure to lever out the inner oil seals ( REMEMBER TO TAKE THE BIG CIRCLIP OUT FORM BETWEEN THE SEALS )
Place the edge of the driver under the seal(push in hard) Place your knee behind and force it out.
The seal will come out suddenly and fly across the room, only for it to hit the curtains where it will leave an oily stain.
*
Might be able to help you out on that side of things. I have a set of Z2's that the crown is cracked on. The rest is working fine and the bushings are ok so you could use them in place of the worn ones you have

The difference in length between to 2 is i believe minimal or about 8mm so its not going to make that much of a difference.
The bushings on bombers compared to modern fork bushings is length. Bomber ones are 90-100mm in length ,coated with PTFE , and i think modern are narrower but in a series over distance

Not totally stripped a modern fork like a fox

So can only guess from the spares they sell at crc
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1976 Raleigh Chipper,1991 Muddy Fox Adventurer,1991 Claud Butler Ventoux 400 ,1992 Raleigh Diablo ,1992 Rudy Project, 1995 Cannondale M200 ,1997 Santa Cruz Tazmon ,1997 Specialized Stumpjumper ,1997 Specialized Rockhopper ,1997 Marin Quake 9.0,1998 Marin Pallisade trail ,1998 Raleigh Torus,1999 Orange Clockwork , 2005 Kona Hahanna ,2007 On-One Inbred ,2010 Orange Pure7 And of course Me Ti 
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