Anyone know where i can just buy a transponder bubble to house the UK imobilizer chip???

I've got an STI-7 style key, as it looks better than a UK plastic key and it doesnt have a space for the chip and without it i'm stuffed!

i asked Scoobymania if they sold the bubble separately but they sent me an email telling me they didn't sell them! (oh yeah? look at yer website mate!)

any help or advice would be appreciated!