I know nothing about this company's credentials, origin or if they ship internationally. I was just searching the www while watching the snowflakes fall and ran across this ad.

https://cantuesoseeds.com/en/shop/bulk-seeds/cupressus-sempervirens-horizontalis/

I also do not know prices when displayed in pounds.

;-) hth

Many authors have recognized that the species broadly assumes two growth habits, fastigiate or horizontal, and have assigned subspecific taxonomic ranks on that basis. It is widely thought that only the horizontal form predates human activity, with the fastigiate form having a horticultural origin dating to early historic or prehistoric times. Thus it is a cultivar, not a variety or subspecies. There is also some question as to whether the fastigiate form is strictly heritable; it appears that "horizontal" specimens may arise from "fastigiate" stock (Stankov 1999, Farjon 2005).

[To the right of the preceding paragraph are photos showing both the skinny and the broader habit together in what appears to be the same planting]

Cupressus sempervirens (Mediterranean cypress) description (conifers.org)

This link has some interesting information about horizontalis rarely being sold in commerce, under 'Noteworthy characteristics'.

https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=279588

Yes sorry, what I should have said was the native 'species' tree (with outward growing branches) not 'horizontalis.

Sheffield’s also appears to have some

https://sheffields.com/seeds-for-sale/Hesperocyparis/sempervirens///Horizontalis////5170/Italian-Cypress,-Mediterranean-Cypress/Italian-Cypress,-Mediterranean-Cypress