ILX Lightwave LDT5910B - help with GPIB ICs

[pshersby]

I've just done a reapir on one of these thermoelectric Temperature controllers.  Video here https://youtu.be/elwUcfqSWdY?si=X5owFA6owSzTzzDb.  I made a replacement linear Power supply board because I couldn't find a suitable replacement transformer. I'll try and get schematics and gerbers uploaded somewhere.
BUT my problem is that my unit is missing the GPIB ICs, everything seems to be populated except three ICs in the corner and the DIL header to GPIB connector cable.
Anyone know what the 3 ICs are please or could send me a photo of that corner of their board - sorry picture is not great, taken from video capture.

Link to Github for Gerbers etc for those who might need them https://github.com/pshersby/ILX-LDT-5910B-PSU

[coromonadalix]

https://www.artisantg.com/info/ILX_LDT5910B_Manual.pdf   no schematics 

could be a Intel 8291 gpib talker listener  and the other should be  line drivers ??  stated in this manual
or 8292 8293

https://www.manualslib.com/manual/1932192/Ilx-Lightwave-Ldt-5910.html?page=43#manual

https://w140.com/tekwiki/images/5/57/I8291A.pdf

intel 8282 for the 20 pin ic ?? or Intel 8282 is functionally identical to 74573 or 74373 octal latch, although the pinout differ slightly.

[picburner]

DIP-40: NAT9914 (TMS9914)
DIP-20: SN75160B
DIP-22 Wide: SN75162B

[pshersby]

 
Thanks for the info,  now just need to find them!