1. Check the transfer/loan list
2. Check the clubs who went down in the top 5 leagues.
3. Check players like Hennessey(2. choice), Rønnow(from Brøndby IF, Denmark - young), Sondre Rossbach(young), Ospina(2. choice), Bogdan(2. choice), Sergio Romero(2. choice) - even though Ospina and Sergio Romero are probably out of your wage range.
Edit: just went to check FM for more options.
Cillesen, Zoet, Moya, Zieler and probably a lot more