Heathkit ET-3400

I picked up an ET-3400 6800 CPU trainer today. It was obviously abused by several students in a past life. I've resoldered its broken connections, and it seems to work OK, but I can't fully test it yet because I'm missing the seven-segment LEDs and the monitor ROM. I happended to have the manual for a 1977 version of this trainer, but my trainer appears to be from 1987 or so and has a few differences (for one, it uses a 6802 rather than a 6800). Luckily, the manual has a listing of the monitor ROM. But I don't have a 6800 assembler. So, does anybody have any of the following: 1) A monitor ROM image (preferably for a 1987 model) 2) A 6800 assembler (preferably Linux-hosted, but DOS will work) 3) The EPROM part number for this board (the man. mentions MCM6830A, but that doesn't ring a bell with me) 4) Part numbers for the 7-segment LEDs (I only have Heathkit part nos.) 5) A spare "1" key for my keypad :-) -- Doug