Any sailmaker can make sails for that boat... sails are not boat-brand-specific. Find a few sailmakers near you, get them to measure your boat specifically and quote some prices. Tell them your primary use.. eg cruising vs racing and they can create the sails you need.
Alternatively if there are budget constraints you could search for P26 sails among the various used sail websites, but it's tough to know what you're really going to get that way. On-line lofts like FX seem to offer cut rate sails too; just remember if you buy something long distance and it needs modifications you're on your own.. if using a local sailmaker they should make it right for you at no extra cost.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)