So here is my friends response, I didn't check any of the websites, cuz I am at work and you are bored and in bed, so I figured you woulnd't mind having to check them out!
"Tell her to go to brides.com and type in sunflowers brides did a fall spread and alot of the ideas were great for a rustic look. Also for candles she may want to look into Mason Jars as well as the jelly jars and these can be found at thrift stores ( especially the Care and Share her in Souderton ) I don't know where she lives but she should take a look at place that are more of a variety shop.
Also tell her to google satnspurs ( this is another website with lots of ides on the Western Theme ). They have pictures of cakes, centerpieces, attire. They also have good ideas for favors and other little trinkets for decorating.
Also there are flameless tealights that can be used in votives and that I believe are relatively inexpensive for her original idea. I saw them at Southern Living presentation. I think you can even them at a dollar store.
Of course old Root Beer Barrels and old wash tubs are great for decorating touches or small metal buckets make great centerpiece holders in pictures I have seen. ( for the more rustic look you would go with tarnished metal buckets the colored ones are easy to come by but they don't really acheive the rustic appearance that tarnished silver metal gives )
Recently, I have seen the use of fruit in centerpieces like green apples, limes, lemons, oranges, peaches etc. I have seen them used in various different ways but I like the ones that are displayed in glass jars which would go well with mason jars or jelly jars. In choosing flower perhaps simply add fall berries and wheat to your arrangements instead of other types of flowers or other greens.
the most important part of keeping the theme is really to find items that would be around the "farm" , house or kitchen that are readily available and can be made to look simply pretty."