http://archives.myco...html?1106008656
If you have good sterile technique, cloning from dried material is a cinch.
I started with an X style petri dish.
One section is poured with gentamycin agar
The other three poured with standard agar prepared in the usual fashion.
I did this two different ways in order to demonstrate just how easy this is.
First, I've selected material from a gourmet sample which was stored in a plastic print baggie and shipped.
During transit the bag was ruptured, the sample squeezed out into the envelope, and the sample seemingly destroyed.

Samples of this material were rescued - as cleanly as possible - and transferred to the gentamycin section of the plates.
New, clean growth was observed after only two days.
So now let's try this with a dried fruitbody sample.
This fruitbody is known to be at least one year old. Was stored in a tool box in a garage and forgotten about. Has been handled many times with no aseptic considerations at all. Sample was returned to the lab for experimentation.

First, I split the sample as best I could.

Material was selected from the cap area. I tried to get material that had previously not been exposed to open air.

Select a tiny sample and transfer to gentamycin agar.
Seal plates with parafilm and incubate

Note the blueing of the transfer as it rehydrates on the agar!

In this manner, dried mycelial tissue can be revived with ease.
I've also done this with culture plates which dried out during storage under refrigeration with excellent results. In the case where sterile tissue is being revived, the gentamycin agar is not necessary.
I hope this helps with your rescue efforts.