Do not spend a lot. There are options which can be obtained on loan. For a new coming club to the Serie A, the below options won't be bad. Honestly, you'll not get value for money for 2 mill for a full back / wing back. Keep the money for wage where an aging star would come to you for a season or two..
Ashley Richards - Swansea (Loan)
Jenkinson - Arsenal (Loan)
Ruben Ligeon - Ajax (Loan)
Thanks for the suggestion. I couldn't find a decent right back to loan for the right amount of money(for me), so I ended up buying Pablo Alvarez from Catania for about 650k. Bu he is quite a bit better than the right back I already had.