You can buy a shiny new cover for around 30-50 pounds and search Ford sealant gasket, it is 21 pounds but sometimes you see it for a tenner on eBay.
Get I fine chisel but not to sharp and when you remove the cover you gently go around the engine and scrape the old sealant off (Carefuly) spray wd40 then wipe then scrape etc keep doing that until it is shiny and clean.
Carefully though as you are being surgical about it.
Ppl have replaced the timing cover but it really is 5050 whether it'll leak again, it looks shite too, new cover done correctly, read the sealant instructions as it tells you to wait a little and how to cut the nozzle.
You can use other cheaper sealants which I'm sure someone will recommend.
This 1 looks genuine but do check.
https://www.ebay.co.uk/itm/Ford-Transit ... 3669999961?
fits=Car+Make%3AFord%7CModel%3ATransit&hash=item3d63f4e959:g:jjkAAOSwKMRa7ZNN
Aftermarket with aftermarket sealant-no idea of quality.
https://www.ebay.co.uk/itm/TRANSIT-2-2- ... SwQ19apkluI've used these they're fine. You'll see an extra gasket with this the metal triangle, you may or may not need that, yours is most likely find as it has rubber seals but if you plan on going part service of the engine then buy it, it isn't listed on the other ads I've put up so you'll need to do some maths.
https://www.ebay.co.uk/itm/FORD-TRANSIT ... xyMKNSJIdIAlso for about 200gbp you can buy the whole timing chain kit and cover etc. But you'll have to see what feedback they have and the quality. I always try and get Ford items. Tensioner Ford and the guides are cheap from Ford too.
Don't use the green paper gasket that comes with any cover or sump on the mk7 throw it, use the Ford black sealant.
I can only find 1 and it is expensive, usually see lots for around 10gbp buy I guess all this warranty work there doing on the new transits it must be getting used up
https://www.ebay.co.uk/itm/GENUINE-FORD ... XQROxRfnpxI'm assuming you pride your van but if it is just a work van and you don't care then you can carefully remove your cover trying not to bend it then clean it and the engine up and use a cheap alternative sealant and hope that does the trick.
Crank seal you need to fit it without twisting it.
https://www.ebay.co.uk/itm/FORD-TRANSIT ... xy63FS1BJc