Could someone help with a part number or link for a locking fuel cap please

I bought this one off ebay which in the compatability list says it fits but it didn't, it was too short where the lugs are...

http://www.ebay.com/itm/162271723255

Seller was really good and instantly refunded the transaction when I contacted them but with the price of fuel here in the UK, I'd like to have a locking cap if I could

I don't know if having the flareside makes any difference?

Or, is there a std looking locking flap available instead as an alternative?

Thanks

Adrian.

 

Stant brand. Part Number 10502. I have this on my 150 and another number on my Mustang. Fit is great, brand is good.

 

Thanks AK

Just got to look now and see if any of the sellers will ship to the UK or if I get it shipped to Florida and brought over by the guy who shipped my truck...

 

Walmart, Autozone and O'Reilley's all sell those. You could just order that number from either Wallyworld or Amazon and get it shipped to you.