Help Identifying Boat

Hi there just bought a second hand fibreglass boat and was hoping someone could tell me what make/type of boat it is.

It is 13 foot long and 5 foot wide, there is a centreboard housing.

It came with a mast and boom and there is a rudder attachment.

I have attached a few pictures if more is required that is not a problem.

So my questions are what is the make of the boat and what mast housing am I going to need to buy for the mast as there is nowhere for it to slot into. (as shown in pics).

http://img682.imageshack.us/i/dsc00080qo.jpg/

http://img522.imageshack.us/i/dsc00082tp.jpg/

http://img580.imageshack.us/i/dsc00081cw.jpg/

http://img243.imageshack.us/i/dsc00078xh.jpg/

http://img293.imageshack.us/i/dsc00079h.jpg/

Any help would be great, many thanks.... HB