Marko Babic is the best left winger you'll find for free, he'll do an excellent job for you. Or Kryznowek, also free, has better stats but will only last a season for you. Assulin can be quality too but he asks for high wages.
In what role are you looking to play your striker? There's quite a few I could offer. Loan moves for chris wood if you need a complete forward/target man, Loan for sears/hines from west ham if u need a poacher. There's also styvar, soukouna and guillermo franco on frees who will do a very good job.
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If after all that, you're still stuck, click on my signature, go down to my screenshots of transfers and you can see who I bought to get derby promoted first place in first season, it should be easier with forrest tho to be fair.