Where can I buy an MS points code ?

Ok, so Dawnguard is out tomorrow and I currently have no points I intend to buy it and Trials Evo which adds up to 2800 points. I only have a debit card which xbox live nor paypal or anything like that accepts. The stores nearby only sell 2100 cards and I don't want to spend £40 when I won't use half the points as I'm kinda short of money.

So my question is, Does anyone know of a reliable place online where I can purchase MS points and they will e-mail me the code or something to that effect ? By the way I'm in the UK in terms of XBLM region stuff.

Thanks for any help.

@Sean2206: Xbox live and paypal both accept my debit card, what is wrong with yours?

ShopTo sell instant codes. 2100 for £17.85.

http://www.shopto.net/XBOX%20360/VIDEO%20GAMES/XB21202INSTANT-Xbox%20Live%202100%20Points%20Card%20Instant%20Access%20Code.html

Amazon download code always works for me. Sometimes they're on sale too.

@Sean2206: How many points is Dawnguard supposed to be?

@jking47: It's a Maestro card which seems to be rejected by a lot of places apparently they've had security issues. Xbox Live, Steam and paypal all don't accept maestro.

I use ShopTo for instant codes. They arrive very promptly and they usually have decent prices.

@laserbolts: I thought I read somewhere it was 1600 points.

@The_Hiro_Abides: Might be a stupid question but how do I buy the donwload code when I go to buy points on amazon it asks for delivery details so I assume they're gonna mail it.

@Sean2206: If you don't have the option for "online game code" then it must not be available in your area.

Ok so Hi again, does anyone know anywhere else that provides a similar instant access service becasue Shopto only allow instant access codes to be purchased if I'm a member for more than 30 days.