英语翻译，请帮忙译一下.

Regarding to the materials of which we cannot offer samples, we have already found their substitutes whose specification and parameter are very close to theirs. Please help to confirm that whether they can replace the original ones. If they cannot, please help to find some substitutes that can match.

As to the material that we failed to provide a sample, we found an alternative which is muck alike in specifications and other parameters. Could you kindly help us to determine whether it could be a possible substitute. If not, kindly help us to find one suitable.

Failed to provide samples on the project (materials), I have found a substitute for them, the parameters and specifications are quite similar, may help to confirm whether or not to replace the original. If you can not replace, you may also help in finding a substitute for that match.