If you aim for CD34+ cells only, you can try Dynabeads™ CD34 positive isolation kit in Thermo Fisher. The procedure is very simple.

Hello

Diamond CD34 Isolation Kit (MACS, Miltenyi Biotec;. Bisley, Surrey, UK)

https://www.miltenyibiotec.com/UN-en/products/macs-cell-separation/cell-separation-reagents/microbeads-and-isolation-kits/hematopoietic-stem-cells/diamond-cd34-isolation-kit-human.html

Good Luck

Here are two other well-working kits from Miltenyi Biotech.

CD34 MicroBead Kit UltraPure, human, 130-100-453.

CD34 MicroBead Kit, human, 130-046-702.

Miltenyi also has media and supplements for the cultivation of the isolated CD34+ cells.

I have used Miltenyi kits (both regular and UltraPure) and StemCell's kit. I compared them on cell suspensions obtained from fetal liver samples (not bone marrow, but I imagine they work well for isolation from different sources of tissue). I found the viability and purity to be similar (Miltenyi's UltraPure is better than their regular kit, but a little more expensive). Both companies' kits are of the positive selection variety and use magnetic beads. Miltenyi's kits require that you purchase columns for use with a magnetic rack (or in the AutoMACS machine, if you have access to one of those). StemCell's kit does not require a column, just a strong magnet in which you place your tube (and the size of which is dependent on your starting sample size).

The output of the StemCell kit was slightly higher yield/purity in my tests (surprisingly, as I thought Miltenyi's column would help with purity). When I use the StemCell kit, I prefer using the "Big Easy" magnets (each holding a 15ml tube) as opposed to their "Easy 50" magnet (which holds a 50ml tube, but requires you pipette up the negative fraction as opposed to pouring it off). I also use StemCell's SFEM II media and supplements (in lesser concentration than recommended) to culture my cells. I don't have a physiologic ("hypoxic") oxygen incubator, but if you do, use it for culturing.

TL;DR - I can recommend both StemCell and Miltenyi kits for your needs. I have not tried Dynabeads™.