John,
Not sure what your budget is ...private / commercial ... but if the latter this equipment works and is 40 - 50mm diameter but can see couple of metres in each direction if clear water... and probably can be run by hand on a short length of cable....rest of gear is pretty portable...couple of air boxes...
I believe they have a base in Aberdeen....
Downhole Video
for those in the business they have some great clips of junk lost down hole..
Best of luck,
Steve