I expect other people can get them, the national chains are not usually interested in looking for stock but local independents are usually quite helpful.
As well is two words!
How does a sage know everything about everything? or does he? or does he just think he does?
Remember, if you buy something you bought it, not brought it.
5.20x 14 are crossply tyres. even classic car and caravan owners, like myself, tend not to use them anymore. The chances are your tow vehicle is on radials, so makes sense to upgrade to radials. The radial aquivilent is 155.60x14. Commonly used on Astas and the like. If the trailer is used for light weights, you can fit car tyres. For heavier weights, use van grade tyres. These have extra cords. I have just bought a pair of part worns off fleabay, for my teardrop camper for £17. If it sits outside the sunlight will detiorate tyres while it stands. So no point in spending a fortune.(Best to cover with canvas or old carpet, when left standing).
------------- VENI VIDI VACATIOUS (I came, I saw, I stayed for an holiday).