Glyn, You might be looking for an 1176 bulb. 1156 is single filament, 1157 has the staggered pins, check 1176. It's been a while since I looked for them, but I believe they're still around. Try this link: http://www.imperialinc.com/grp148.shtml and click on this: http://www.imperialinc.com/items.asp?item=0815790 They sell in packs of 10. Good Luck! Uwe