Breakdown cover for long European trips

We have just purchased our caravan with the intent of long trips away in Europe. All the car breakdown companies thus far contacted restrict cover to 90days in any one trip but we are looking for 120days. I suggested that cover could be timed so that 60 days could be at the end of one policy period and the other 60 days at the beginning of a new policy period but the mantra is policy is not valid unless returning to UK within 90days even though this would be outside the policy period covered! Any advice would be welcome please.

ChrisPF