OK, this might not help you with your quest to find a referee, but since you've already rejected the suggestions put forward to you by both others on this thread and UCAS, there's not much more help that I can give you on that point. Having said that, here's some stuff that i've gleaned from various sources and experience that you might find helpful:
From my discussions with many admissions tutors in preperation for my own application to university this year, I can tell you that universities are generally looking for just three things in mature students:
1) Evidence that you're genuinely interested in the subject you wish to study.
2) Recent academic experience at an appropriate level (I.e Level 3 or 'A' Level)
3) Evidence of appropriate academic ability (Grades & Qualifications)
Obviously number 1 is a given. Number two is very important. You need to be able to show recent study experience. Without this, the very least you'll need is some sort of reference that will tell a prospective university how you will perform as a student, and (linking to number three) this will need to be backed up with academic grades you've gained in the past.
As previously stated, you can get a reference from people who know you in a professional capacity, however you need to be aware that unless they can write about your academic ability/potential, their reference will not be all that useful to an admissions tutor.
Some universities do give some slack to mature students if they have work experience in a similar area to the degree that they wish to study, but with how competitive university entry is these days, you can't expect to get far with just work experience and a good character reference.
Why not tell us a bit more about yourself - What do you want to study? What universities are you applying to? What grades did you get at school/college? Do you have any previous degrees/relevant experience?
It might well be the case that doing an access course will be good for you not only because you'll get a referee from it, but it might be necessary to pick up the experience you'll need to do well at uni.