Jelliot:
Pebbles there are a right bunch of rude buggers on here, you asked a question on the 9th and no ones answered you yet.
I use Chris Moxham for my decals, you can bung his name in google and put decals after it and it’ll come up.
I either draw something out, or take a photo of a real truck and email it to him, tell him what size it needs to be for your model, then he’ll email back a proof. Print that out on you printer then cut it up and stick it/ hold it on the model and see how it looks, if it needs to be bigger or smaller let him know and he’ll send you another one. When it’s right he’ll send you the decal sheet.
There are a few guys that do a similar service Dodger decals springs to mind, as does Spot On… If you get Wolfie on a good day, he can knock them out as well. I’ve had a shot at doing some for my self, but they’re not a match on a pro job…
Jeff…
Hi “Jelliot”,
With reference to your right bunch of rude b*ggers on here.......
, please do not castigate me as being (the) one of the quoted date
of August 9 th., re: request made by “Pebbles74” . 
I shall explain as to why there was no visual reply to “Pebbles” on here.
I replied to "Pebbles74 " that same evening via a p.m. I am sure he will verify this.
The details which were requested by “Pebbles74” needed further cross-correspondence , - therefore the p.m. method was chosen.
I used this system of communication , even though I had already shown photographs on here.
I understand that “Pebbles74” was satisfied with the help I gave , although it may have differed from your own method for
producing waterslide decals for a bespoke model.
I hope I have fully explained myself to your remark.
Please do not tar all of us with your brush. 
Cheers , cattle wagon man.