I found an German agent who was able to get me a visa - though this was about 4 years. I will have a dig around and see if I can find the details.
I have flown out of TIP but only on a domestic Libyan Arab Airline. I would say the facilties are O.K, if a little ramshackle. I would NOT fancy trying a turnaround - most of the staff I encountered were pretty incompetent. Hotels were pretty poor - either v expensive or quite nasty. Prices could be reduced by playing the black market - though that is punishable by life imprisonment!
Are the savings worth all of the hassle involved?