Until you have your own stash of catalogues, you can use Google or GardenWatchDog.Com to locate on-line seed catalogues. For Google, use 'advanced search' and click on 'catalogues' then 'Home & Garden' then 'Seeds.' Be sure to check the sources out at Garden Watchdog. The Monarda you're looking for may be vegetatively propagated. Not sure. But you should be able to find seeds for more common Monardas and the Echinops at Parks, Pinetree, Territorial seed, Select Seeds. For uncommon seeds, Chilterns & Jelittos.

The monarda may not be available in this country. I've been trying to get/find Monarda Feuerschopf (orange) since someone else inquired about it. It was only available from one Canadian company in 2002, and I still search for it every year, without any luck...

Globe Thistle is available at Bluestone Perennials. They sell perennials in small 3-packs that look so dinky and doubtful on arrival, but that once planted take off! I have had great results ordering from them and am currently working (with great delight) on a spring order. (It's always a good idea to check the Garden WatchDog, too.)

Here is a link that might be useful: Bluestone Perennials

Sorry, the only thing I can find in my catalogs is the lavender, lemon and red. That's from Horizon Herbs.

Deer-Resistant Landscapes at deerxlandscape.com lists Monarda "Beauty of Cobham"---if this helps. (I used Google.)

Go to "www.google.com".
Click on "Services & Tools"
Click on "Froogle"

If I search Monarda "Beauty of Cobham" I only get one hit. This isnt a perfect tool, but it does give you a shortcut.

Ironically, when I did a regular Google Web search I came up with many more merchants that carry it.

Springcherry, compulsive librarian

I stumbled across SEEDQUEST.COM that will find online sources.
-Donald

Likewise, I got 225 hits for "beauty of cobham" using a basic Google search (many - but not all - of them leading to foreign sites, of course). Maybe taking a different approach to your search will give you better results.

The Echinops ritro is a common item, possibly even one of the most commonly offered perennials (although there may be a problem with other species of Echinops being offered under this name). If it grows in your area, you will most likely be able to find it locally, as well as in catalogs.