interior lights in 1997 r plate shogun?

I need to replace the interior lights in the shogun. However the book says they're a "269" model festoon bulb. . . howver they are NOT! they are slightly smaller. . . and the 269 wont fit, not even with force! . . . tried halfords and they dont have them nor can they get them. . . . mitsuishi are out of stock apparently. . . anyone know of a internet site i can purchase them from. i need three. and they are about 26mm in length. not 31mm like the 269 is. Many thanks. and Kind regards.