you can get a 1157 or 1156 bulb socket with wires at lots of parts stores, and just creatively glob it in with JB weld. Or you could get a whole blinky thing from someone here, lots of us have them in a box somewhere.

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/