Ya sorry I should have explained myself better
I'm not sure what guy in riften, you can google it, if it doesn't show up I can let you know by tomorrow when I play again!!
For the leather strips and iron ingots I went to WhiteRun. Head to the blacksmith. You can buy leather and leather strips from them (take the leather and go to the tanning wrack right beside the building next to the smithing station, it will give you more leather strips).
With the iron ingots you talk to the same person, buy all the iron ingots possible from them, wait 2 days by simply clicking (just in case your a noob ) the back button and moving it two 24 hours, do that twice. They should have a new supply of gold and ingots