Lee, this ISWB will work nicely : https://wethepeopleholsters.com/products/smith-wesson-m-p-shield-crimson-trace-laser-9mm-40-kydex-concealed-carry-holster-iwb?utm_medium=cpc&utm_source=googlepla&gclid=EAIaIQobChMI2tSwoICt4AIVwySGCh23aQwFEAQYASABEgJpgfD_BwE

Here ya go Lee - Five to choose from. CYA Supply holster for Shield with Crimson Trace;
Concealment Express holster for M&P Shield with Crimson Trace; Blade-Tech Ambi Klipt holster; OutBags LOB3S-SHIELDX holster for S&W Shield with Crimson Trace; and, Outlaw carbon kydex holster for Shield with Crimson Trace.

CYA Supply Co. makes this:
amazon.com/CYA-Supply-Co-Holster-Fits/dp/B01A9BSSW6/ref=sr_1_1?keywords=cya+supply+shield+crimson+trace&qid=1549658654&s=Sports+%26+Outdoors&sr=8-1
and here is one from Concealment Express:
amazon.com/dp/B01CR9RU4A/?tag=on-holsters-for-shield-with-crimson-trace-20
Those are just two that I found on Amazon, there are any number of custom holster makers that could have one molded to fit the Shield with the laser.