I am trying to create a script based font with flowers and swirls to use in monograming, or would like to enlist someones help in producing an alphabet like this for me, or purchasing a ready made font of this type.

Does anyone have advice on how I should progress ? Is there a site or place were people specialise in this sort of thing ?

Not sure if you are asking for someone to take artwork you have prepared and make it into a font, asking for someone to design you a monogram font or asking where to find monogram fonts .
If its the latter, all the 'swirly", floral monogram fonts I can think of are to be found here:
http://www.fontbros.com/selectronic/monograms
or by searching for monograms on here:
https://www.myfonts.com/

Thank you Pilaster !

I was looking at any of the options listed above in my questions, but I followed your links which led me to other sites and I eventually found pages of hand embroidered monogram fonts which is exactly what I was looking for.

Thanks for your help !!