I really like my Spider Valve MkII 212, but the 14 second looper is about 10 seconds too short.  

What are any of your recommendations on what to do about this?  First of all, is there any way to make this longer?  If not what products would be best to attach/add for longer looping.  I have looked at many Line6 and non Line6 products and it seems that my quest for a simple loopoer that is longer than 14 seconds doesn't exist.  All of the looper products have other features/abilities and you pay for them.

Any suggestions?