Jolana ...
The rose is readily available from many nurseries. It is sold under several different names.
One question, first ... in general where does your cousin live ? Damask roses require chill hours to thrive.
Greenmatle Nursery
http://www.greenmantlenursery....
Antique Rose Emporium .. sold as 'Autumn Damask'
https://www.antiqueroseemporiu...
Burlington Rose Nursery ... sold as 'Autumn Damask'
Burling does not keep her website up-to-date
You can get contact information here:
http://www.helpmefind.com/gard...
Heirloom Roses ... sold as 'Autumn Damask'
http://www.heirloomroses.com/
High Country Roses ... sold as 'Autumn Damask'
http://www.highcountryroses.co...
That should give you a start. If you need more nursery names, just let us know.
Smiles,
Lyn