Engineered Soil Repairs gives an estimate that is, I believe, fairly priced.  Any kind of work like that will be pricey, but they are very competitively priced.  When they say the job will be done, they have it done.  They were exceptionally professional, and they cleaned up so well that the side of my yard was spotless and may have even looked better than before they came out.  I liked the fact that their crew was absolutely professional, and they let me know what was going on every step of the way.  They took pictures under the house, so I could see what they were doing.  They showed me what was rusting and what the new ones looked like.  I was kept abreast of everything from start to finish.  I felt completely comfortable and I would recommend them to anybody.  They did the job so thoroughly that I know my foundation is completely level.  I have no worries.