Yep, Rob, I'm similar but cheaper.
A piece of 'glad-wrap', a heavy smear of the top working area of the culture, wrap it up and sellotape, send.
On arrival,
Add to a piece of damp bread that has had a small amount of dry yeast spread onto it. Wipe the starter onto this.
Micro worms will start climbing in about a week using this method.
Straight away, make a new culture as a back up, in case the first should go off.
Alan