You can get a lyophilized YT-1 strain from ATCC, United states (Code: ATCC 25104)

You might want to check out the work of Nicola Souter. She did her PhD at Herriot-Watt Universityon some years ago and it is possible that her old lab may have strains.

Thank you abimbola and thank you Phillip I want to know how can i contact Nicola Souter :-)

DSMZ catalogs are usually cheaper https://www.dsmz.de/catalogues/details/culture/DSM-625.html?tx_dsmzresources_pi5[returnPid]=304

Or cheaper still would be, as Phillip suggests, asking for a strain from someone researching the organism.

Thank You Garwai :-)