Why not do what the rest of the world does and buy something NEW and modern......... there is a reason the worlds airlines retire these old dogs, they cost a fortune to maintain and in the long term a A330 etc would pay you back dividends over flying something you get in African states these days....... Typical British Government spending plans, buy cheap tired old dogs then spend a fortune maintaining them....... there is good reason Airlines get rid of the old aircraft in their fleets, and that is they would go bust keeping them flying...
Look at the VC10....... that was on it's swan song when I worked on them 15 years ago, these days it must come with it's own zimmer frame.......
It amased me when the UK Government donated XYZ millions to Pakistan to combat terrorism of late........ when you look at what they fly and can afford to maintain and then look at what the RAF is still operating, one often wonders if the money should not be coming the other way......