Replying to People in Western Germany I Have A Trade for You

Hey West German (Dusseldorf, Dortmund, Cologne, etc...) Newschoolers, I have a favor to ask of someone in that region. I am (slowly) on my way back to the US from Kazakhstan. I will be in this region of Germany from May 15th-20th and I am trying to find a place to keep my skis (ski bag). Does anyone know where I can keep them that would be safe? If any of you are kind enough to offer your own place for storage. I have a tomahawk plaid shirt (size m) OR a jiberish sweatshirt (size L) and a beer as a thank you. The tomahawk is a plaid long sleeve that is red and black. The Jiberish is a red hooded sweatshirt with corduroy stitching on the front pocket, back shoulders, and the elbow pads. I'm in need of help, so I would appreciate any advice or assistance.