Sorry for the delay.. Comcast likes pre 1992 Conn Speeds here;
Arm Rest Repairs/Mods Source: by Billingslee (Bronco Bill) at SuperMotors.net
It appears to be = to your problem
Bill wrote elsewhere;
"...so recently my passenger side arm rest suffered some carnage when a fat kid leaned on it...
went to 3 junk yards in search of the right one but all of the bronco were of the wrong year. So i decided to deal with what they were givin me and take one out of a 90 or 91 and of course it was to tall and a different shape, so i clamped them together and trimed the fatty using the old one as a template.
I used the pieces of foam i shaved off to fill in where it was short
then i used 3M super stregnth spray on shit to glue them on the back
Next i taped the **** out of it to smooth out the edges and get the angles from the old one i needed."
Same too: Repairs in a 94 Source: by R94broncoXTL (Ryan) at SuperMotors.net
Let us know if this is what you need.
GL!