Hi djkoelkast
if you are not enough skilled with soldering, you have only 2 choises:
purchase one new from AmigaKit or ComputerCity or used on ebay.
Remember that all Amiga specific/custom accessories are quite expensive (not so much in this case beeing rare) and above all, that if you fail to make the soldering job, you'll "fry" your (expensive as well) SD/FF&Co.