What laptop power supply should i get?

I have 2 laptops one is a HP Pavilion DV6707US
http://www.shopping.hp.com/shopping/data_sheet/kc323ua.html...
and the other is a Compaq R3460US
http://h10025.www1.hp.com/ewfrf/wc/...728&lc=en&dlc=en&cc=us&lang=en&product=445589...
now i need power adapters for both.
the hp one need 90w i think, the compaq needs 120 i think.?.?.?
i have found some 3rd party adapters but my exact models are not ever mentioned for example i can find one for the dv6000 but not dv6707 ect. so I need to know if they follow some sort of product range or is all by exact model i think i can get them from hp but for way more then i feel they are worth so any help clearing this up would be great thanks

 

Well, I have seen some multivoltage adaptors that range around 30.00 bucks, because I think: Hp adaptors are expensive. Arent they???

 

Found these 2. Have never used this company.
They at least mention the specific model numbers -
http://www.shoplaptop.net/reacpoadforh1088.html
http://www.shoplaptop.net/reacpoadforc311.html

(Try googling model # power adapter)

 

ok thank you for the help