I wear daily disposables and used to get them online from a site called contactlenses.co.uk
If you buy 2 or 3 months at a time it works out cheaper, and you can find out from the optician which lenses you wear. You can then choose an opticians who offer free eye tests and ask then to do a contact lens check on you as well (although you will probably have to pay for that)
By the way, if they are daily disposables you don't need solutions, they come in little individual pods with a tiny amount of saline in them so don't bother with solutions, you'll never need them!