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CC2640R2L: Clarifications for balun selection

Part Number: CC2640R2L

Hi,

Upon reviewing this document (https://www.ti.com/lit/pdf/swra640), the suggested baluns for this MCU are the LFB182G45BG5D920 from Murata and the 2450BM14G0011 from Johanson. In this same document, in section 9, it seems to suggest (as far as I can tell) that the load impedance of the MCU is not exactly 50 ohms.

Does this mean that we cannot use any other general 2.4GHz baluns, and must use these ones that are specifically designed for the MCU? Due to sourcing issues, we cannot easily get our hands on these baluns and would like to look for alternates. Can someone please also suggest an alternate, if applicable?

Thanks