If you are not into DiY projects or cannot find anyone to make one of the above mentioned projects for you, the Z.Vex SHO or MXR Micro-Amp are good choices for clean boost. Also, one of the 7 band EQs in a stompbox can also be used and if the sound does need a little tuning to get the most from your amp then a touch of the slider will bring it out. The amount of bad advice on the newsgroups is staggering. A newbie can post just like an expert will and there are not many ways to discern the skill or expertise of the writer from a short message. Not Entirely True.
Opinions are like noses, everybody has one.
The above are mine today.