After I tried a few times with some different ways of knitting, I happen to find a technique that is almost what you are looking for, I'm not quite sure if this will work for you :?? , but anyways...this is how I did it:
For the first row, I knit once, and then purl, then knit, then purl, and so on.
Then, for the second row, if the stitch was a purl, I knit it on the second row; same thing, if the stitch was a knit, I purl it this time.
Then you continue this pattern.
If you've done this right, you should end up with a fabric that looks almost like knit on both sides, except that if you look carefully, there is a column of non-knit-looking pattern between each column of your knit patterns. But don't worry, the non-knit-looking columns happen to be somehow hidden behind your knit columns, so the whole look of your fabric looks like knit on both sides.
*NOTE: this is not a seed stitch, so you will not end up with a seed stitch(although it sounds like a seed stitch)
That's it! I hope this helps you