Allotments 4 All

Is there anyone out there who has an enormous clump of Mertensia that they might be splitting up and who would like to swap some of it for a Dierama or a rhizome from one of my TB irises.  I lost my Mertensia when I moved it last year and will really miss those lovely blue flowers.  I grow irises so if there is any particular colour (within reason) that you'd prefer please let me know (swaps only!)
Thanks!

Taraven