I would suggest giving CSE Ltd a call at Oxford, they are a main Cessna Dealers and should be able to help you out.............. stupid as it may seem when I was at Rogers Aviation before it went pop we used to have a shed full of ferry tanks that had been used to ferry A/C to the UK then were of no further use... you might find CSE or the likes have similar.
We had a French cessna 310 here that had a wheels up landing here , it was designed to do some really long flights and had a full system for it (not fitted)... it had cabin tanks, nose bay tanks, baggage locker tanks and even a big one down the tail!, I believe it was written off again after being repaired, you might try phoning Steve Coope at Tollerton Aviation, Tollerton Airport Nottingham, he may be able to tell you what happened to the system, as it was all shipped to them with the plane..F-GGGG I think was the original reg. it was boxed up and not in use if i remember correctly..
hope your oil consumptioins are good
