The escort quests used to be part of the old system, so a conversion should be possible for the Solen quests.
The others (hag and collector) are a bit more problematic, as they incorporate random elements.
Personally, I hate the fact that the escort quests (both point to point and rescues) got rolled into the new system. There's something that kills me inside playing a Paladin template Glorious lord, and being unable to rescue a prisoner because I already have one in tow.
Prior to the ML changes, you could get 1 city-to-city escort, and as many rescues as you could find simultaneously, as rescues didn't have a timer that prevented rescue. At the same time, the ability to take escorts through gates and into dungeons (some wanted to go to dungeons as seekers of adventure) didn't work (And you could also lose an escort if there was too much distance between you and them when you crossed a server line), so escorts were an overland affair. You had about 15 minutes to complete the trip. Some rescues simply wanted any inn, any healer shop, any town or any tavern (another sad loss to the system change).
Two months before ML, I picked up an escort in Trinsic, and rescued 4 more on Barrier Island. I then proceeded on foot to Britain, delivering one there, and picking up a replacement south of the Bog of Desolation, north of East Britain. I then went through the bog, down to Cove, delivered another, rescued another person on the way to minoc, delivered two more, and lost 1 of the 3 deliveries to Vesper to time or server line issues along the way, before delivering the last two the Vesper.I used to have a couple of screencaps of my leading the desperate band of ex-prisoners on their cross-continent trek, but that was 2-3 computers ago (hell, I was using dialup at the time)....